If you can't access EL as yet, you can find five fairly tough goblins in Thundering Steppes too. Past the Ruins of Karana, the back door entrance to the Ruins of Varsoon is guarded by five of them.
These used to be group mobs, but were altered.
With the current drop rate of language items, even with only five mobs, you'ld get it all very quickly.
They are lvl 30 though, some 31, but easy kills at lvl 29.